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Keyword Density Checker
A keyword density checker counts how often each word and phrase appears in a piece of content and expresses it as a percentage of the total, so an SEO can see at a glance which terms a page actually emphasizes versus which it only mentions in passing. It is the fastest way to confirm that a target keyword is present without being repeated so aggressively that the copy reads as stuffed, and to surface filler phrases that have quietly taken over a draft.
This tool is free and runs entirely in the browser. Paste an article, switch between single words, two-word, and three-word phrases, optionally strip out common stop words, and read the density of the top phrases instantly. Nothing is uploaded, so unpublished drafts and client content stay private.
| # | Phrase | Count | Density |
|---|
Paste some text above to see its keyword density.
No magic number: there is no ideal keyword density target. Write for the reader first — deliberate repetition to hit a percentage is keyword stuffing, which Google penalizes. Use these figures to spot accidental over-use, not to chase a quota.
🔒 Private: everything runs in your browser. Nothing you paste is uploaded.
How to use the keyword density checker
Paste your content into the box, choose a phrase length, and the table recalculates on every keystroke. Toggle stop-word removal to filter out grammatical glue like “the” and “of” and focus on the terms that carry meaning.
Read density as a signal, not a target to hit
The tool tokenizes the text, lowercases it, strips punctuation, and counts each phrase, then divides by the total to give a density percentage. That number is diagnostic, not prescriptive. A target keyword sitting near the top of the list confirms the page is on topic, while a single word at an unexpectedly high percentage usually points to clumsy repetition rather than relevance. Use the ranking to ask whether the emphasis matches the intent of the page, then edit for the reader. There is no percentage that ranks a page on its own.
Switch between single words and longer phrases
Single-word density catches the obvious terms but misses the phrases people actually search. Switching to two-word and three-word phrases reveals whether a draft repeats a full query like “aged domain checker” or only its separate parts. Longer phrases almost always show lower percentages because there are fewer possible slots for them, so compare each phrase length against others of the same size rather than against single words. The n-gram view is where accidental boilerplate, repeated calls to action, and over-used transitions tend to surface.
Use stop-word removal to cut through the noise
Function words such as “the”, “and”, “of”, and “to” almost always top a raw frequency count, yet they say nothing about a page’s subject. Turning on stop-word removal drops a built-in English stop-word list before phrases are built, so the table foregrounds the nouns and modifiers that define the topic. Leave it off when checking exact-match phrases, because a stop word inside a phrase like “head of SEO” is meaningful. The total word count always reflects the full text either way, so the percentages stay honest.
Keyword density checker frequently asked questions
Q1What is a good keyword density percentage?
There is no ideal figure. Google has repeatedly said it does not use a keyword density formula, and chasing a specific percentage leads to stuffing, which can be penalized. Treat density as a sanity check: confirm the target term appears naturally and is not buried, and watch for any single word that spikes far above the rest, which usually signals repetition a reader would notice.
Q2How is keyword density calculated?
Density is the number of times a phrase appears divided by the total number of phrases of that length, expressed as a percentage. This tool lowercases the text, strips punctuation, splits it into words, builds the phrases you select, counts each one, and divides by the total. Single words, two-word phrases, and three-word phrases each have their own denominator, so compare a phrase only against others of the same length.
Q3What does the stop-word toggle do?
Stop words are high-frequency grammatical words like the, and, of, to, and is that appear in almost every sentence regardless of topic. When the toggle is on, the tool removes them before counting, so the table highlights the meaningful terms instead of filler. Turn it off when you want to measure an exact phrase that contains a stop word, such as a branded phrase, because removing it would distort the count.
Q4Does this keyword density tool send my content anywhere?
No. All tokenizing and counting happens in your browser with client-side JavaScript, and nothing you paste is uploaded, logged, or stored. It keeps working after the page has loaded, even offline, which makes it safe for unpublished drafts, client documents, and confidential copy you do not want leaving your machine.
Q5Why do longer phrases show much lower density percentages?
Because there are fewer slots for them. A 500-word article has 500 single-word positions but only 498 three-word phrase positions, and each specific phrase competes against far more variety, so its share of the total is naturally smaller. This is expected and not a problem. Always judge a two-word or three-word phrase against other phrases of the same length, never against single-word densities.
